9LPRS355BGLFT

Overview

The Renesas 9LPRS355BGLFT is a clock synthesizer IC designed for Intel CPU and PCI Express (PCIe) applications. It operates on a single supply voltage ranging from 2.5V to 3.3V and supports crystal input to generate precise clock outputs. The device features one circuit and is housed in a 64-TSSOP package with dimensions of 17.0 x 6.1 x 1.0 mm. It complies with PCIe Gen1 jitter specifications, offering a maximum peak-to-peak common-clock jitter of 85 ps. The component includes spread spectrum capability and an integrated voltage regulator, functioning as a CK505 derivative.

Feature Summary

• CK505 derivative clock generator optimized for Intel CPU and PCIe Gen1 architectures
• Integrated fully integrated voltage regulator and series resistor
• Supports spread spectrum modulation for EMI reduction
• Delivers up to 21 outputs with frequencies ranging from 14.32 MHz to 400 MHz

Applications

• Intel CPU platform clock generation
• PCI Express (PCIe) Gen1 system clock distribution
• PC main clock circuits

Procurement Notes

This component is listed as obsolete or end-of-life by the manufacturer. Availability is restricted, and existing stock may be limited. Verify current lifecycle status and lead times with authorized distributors before procurement planning. Alternative solutions should be evaluated if long-term supply stability is required.

Selection Notes

Select this part for legacy Intel-based designs requiring CK505 compatibility. Ensure the design supports PCIe Gen1 jitter requirements (max 85 ps C-C). Verify that the 64-TSSOP footprint matches the PCB layout. Confirm that the 2.5V to 3.3V supply range aligns with the system power rails.

Part Context

The 9LPRS355BGLFT belongs to the 9LPRS355 family of clock synthesizers. It serves as a direct replacement or derivative for the Intersil/IDT CK505, maintaining pinout and functional compatibility while integrating additional features like an internal voltage regulator. It is distinct from newer PCIe generations requiring lower jitter profiles.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the part is obsolete, consult Renesas for qualified replacements or evaluate generic CK505-compatible devices if pin-for-pin compatibility is strictly required.